arch/powerpc/kernel/misc_64.S

File Facts

System

Linux kernel

Corpus path

arch/powerpc/kernel/misc_64.S

Extension

.S

Size

10018 bytes

Lines

498

Domain

Architecture Layer

Bucket

arch/powerpc

Inferred role

Architecture Layer: exported/initcall integration point

Status

integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/export.h
• linux/linkage.h
• linux/sys.h
• asm/unistd.h
• asm/errno.h
• asm/processor.h
• asm/page.h
• asm/cache.h
• asm/ppc_asm.h
• asm/asm-offsets.h
• asm/cputable.h
• asm/thread_info.h
• asm/kexec.h
• asm/ptrace.h
• asm/mmu.h
• asm/feature-fixups.h

Detected Declarations

• export __bswapdi2

Annotated Snippet

#include <linux/export.h>
#include <linux/linkage.h>
#include <linux/sys.h>
#include <asm/unistd.h>
#include <asm/errno.h>
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/cache.h>
#include <asm/ppc_asm.h>
#include <asm/asm-offsets.h>
#include <asm/cputable.h>
#include <asm/thread_info.h>
#include <asm/kexec.h>
#include <asm/ptrace.h>
#include <asm/mmu.h>
#include <asm/feature-fixups.h>

	.text

_GLOBAL(__bswapdi2)
EXPORT_SYMBOL(__bswapdi2)
	srdi	r8,r3,32
	rlwinm	r7,r3,8,0xffffffff
	rlwimi	r7,r3,24,0,7
	rlwinm	r9,r8,8,0xffffffff
	rlwimi	r7,r3,24,16,23
	rlwimi	r9,r8,24,0,7
	rlwimi	r9,r8,24,16,23
	sldi	r7,r7,32
	or	r3,r7,r9
	blr


#ifdef CONFIG_PPC_EARLY_DEBUG_BOOTX
_GLOBAL(rmci_on)
	sync
	isync
	li	r3,0x100
	rldicl	r3,r3,32,0
	mfspr	r5,SPRN_HID4
	or	r5,r5,r3
	sync
	mtspr	SPRN_HID4,r5
	isync
	slbia
	isync
	sync
	blr

_GLOBAL(rmci_off)
	sync
	isync
	li	r3,0x100
	rldicl	r3,r3,32,0
	mfspr	r5,SPRN_HID4
	andc	r5,r5,r3
	sync
	mtspr	SPRN_HID4,r5
	isync
	slbia
	isync
	sync
	blr
#endif /* CONFIG_PPC_EARLY_DEBUG_BOOTX */

#ifdef CONFIG_PPC_PMAC

/*
 * Do an IO access in real mode
 */

Annotation

• Immediate include surface: `linux/export.h`, `linux/linkage.h`, `linux/sys.h`, `asm/unistd.h`, `asm/errno.h`, `asm/processor.h`, `asm/page.h`, `asm/cache.h`.
• Detected declarations: `export __bswapdi2`.
• Atlas domain: Architecture Layer / arch/powerpc.
• Implementation status: integration implementation candidate.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.